Hello Ossaio,
Welcome to the forum!
Yes, the brokers provide small Historical data from the beginning, this is a fact. You do not really need VPS to collect data. If you use a computer/laptop you might leave the MT opened there. Even you close it from time to time, it is not a problem for the data. Just regularly go over the currencies and press the Home Key. Also, you can save it as hst files to make sure you are not going to lose it.
Yes, in FSB Pro there are many custom indicators that you can use. And yes, you can use them in Expert with Meta Trader. The indicators are inside the code of the EA, so it does not matter they are not in Meta Trader. Also, you do not need to place the indicators on the chart when trading with the Expert Advisors.